It was narrated from Anas that the Prophet ( ﷺ took the hem of his garment and spat on it, rubbed it together briefly and let it drop. (Using translation from Nasāʾī 308)
أَنَّ النَّبِيَّ ﷺ «أَخَذَ طَرَفَ رِدَائِهِ فَبَصَقَ فِيهِ فَرَدَّ بَعْضَهُ عَلَى بَعْضٍ»